Ok I am doing maint. right now and discovered that my calcium would be about 640 if the chart went that high. How dangerous is this and how much of a change should I do at once? alk is at 9dkh and I am testing ph right now. I have been adding an alk ca builder in the make up water (ro/di) because ca and alk and ph was at the low end last time I tested.
PH is 8
Last edited by cg5071; 10-26-2010 at 12:46 PM.
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